Supercell over Laramie
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Wyoming Snow Precipitation Update


United States Natural Resources Water and Climate Center Department of Conservation Portland, Oregon Agriculture Service S N O W - P R E C I P I T A T I O N U P D A T E Based on Mountain Data from NRCS SNOTEL Sites As of THURSDAY: APRIL 1 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 23.6 17.8 133 27.3 22.8 120 COTTONWOOD CREEK 7600 25.0 24.5 102 27.7 25.7 108 GRANITE CREEK 6770 21.6 18.8 115 23.1 24.0 96 GRASSY LAKE 7265 43.3 36.3 119 40.7 38.1 107 GROS VENTRE SUMMIT 8775 16.0 15.8 101 15.7 16.3 96 LEWIS LAKE DIVIDE 7860 40.8 35.7 114 39.9 38.7 103 PHILLIPS BENCH 8200 32.7 29.4 111 31.7 30.6 104 SALT RIVER SUMMIT 7600 16.2 14.5 112 18.5 17.3 107 SNAKE RIVER STATION 6920 -M 18.8 * -M 26.7 * SPRING CREEK DIVIDE 9000 29.6 28.3 105 27.7 28.1 99 THUMB DIVIDE 7980 23.6 17.2 137 22.5 21.3 106 TOGWOTEE PASS 9580 -M 25.2 * 28.5 29.0 98 TWO OCEAN PLATEAU 9360 36.5 26.8 136 31.3 31.4 100 WILLOW CREEK 8450 33.4 30.5 110 37.8 32.9 115 ----- ----- Basin wide percent of average 116 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 26.2 23.8 110 23.4 18.2 129 BLACK BEAR 7950 50.5 38.5 131 -M 41.3 * CANYON 7940 18.0 13.1 137 19.2 14.4 133 FISHER CREEK 9100 40.1 36.1 111 36.7 37.1 99 MADISON PLATEAU 7750 -M 24.8 * 31.6 26.7 118 NORTHEAST ENTRANCE 7350 11.7 9.2 127 14.0 11.9 118 PARKER PEAK 9400 23.5 21.8 108 -M 15.7 * SYLVAN LAKE 8420 26.3 22.3 118 27.8 19.3 144 THUMB DIVIDE 7980 23.6 17.2 137 22.5 21.3 106 TWO OCEAN PLATEAU 9360 36.5 26.8 136 31.3 31.4 100 WHISKEY CREEK 6800 20.8 17.5 119 23.9 22.2 108 WHITE MILL 8700 27.8 25.1 111 24.8 28.7 86 WOLVERINE 7650 12.4 11.7 106 12.6 12.8 98 ----- ----- Basin wide percent of average 121 110 WIND RIVER BURROUGHS CREEK 8750 17.0 15.0 113 18.3 16.7 110 COLD SPRINGS 9630 9.2 8.4 110 12.1 10.6 114 DEER PARK 9700 16.6 -M * 21.7 -M * HOBBS PARK 10100 17.5 15.1 116 16.1 14.2 113 LITTLE WARM 9620 14.7 11.6 127 16.0 13.3 120 SOUTH PASS 9040 17.7 16.4 108 18.7 17.1 109 ST. LAWRENCE ALT 8620 6.7 7.6 88 10.3 10.2 101 TOGWOTEE PASS 9580 -M 25.2 * 28.5 29.0 98 TOWNSEND CREEK 8700 9.8 9.9 99 12.9 12.5 103 ----- ----- Basin wide percent of average 110 108 BIGHORN BASIN BALD MTN. 9375 19.7 20.5 96 17.9 17.4 103 BEAR TRAP MEADOW 7900 4.8 7.2 67 9.5 8.2 116 BLACKWATER 9780 30.8 22.4 138 25.0 18.1 138 BONE SPRINGS DIV 9350 16.1 16.5 98 16.0 15.1 106 EVENING STAR 9200 33.3 27.2 122 34.4 22.7 152 GRAVE SPRINGS 8550 8.3 9.6 86 11.2 9.6 117 KIRWIN 9550 12.6 10.0 126 14.0 10.8 130 MARQUETTE 8760 8.1 8.1 100 8.8 9.5 93 MIDDLE POWDER 7760 10.6 12.2 87 15.4 11.8 131 OWL CREEK 8975 6.4 4.6 139 6.7 6.2 108 POWDER RIVER PASS 9480 11.9 10.9 109 15.1 11.5 131 SHELL CREEK 9580 16.7 15.0 111 15.2 13.1 116 SYLVAN LAKE 8420 26.3 22.3 118 27.8 19.3 144 SYLVAN ROAD 8120 17.3 12.5 138 19.7 16.2 122 TIMBER CREEK 7950 5.2 6.3 83 7.0 7.0 100 YOUNTS PEAK 8350 21.6 17.3 125 19.1 16.7 114 ----- ----- Basin wide percent of average 112 123 SHOSHONE RIVER BLACKWATER 9780 30.8 22.4 138 25.0 18.1 138 EVENING STAR 9200 33.3 27.2 122 34.4 22.7 152 KIRWIN 9550 12.6 10.0 126 14.0 10.8 130 MARQUETTE 8760 8.1 8.1 100 8.8 9.5 93 SYLVAN LAKE 8420 26.3 22.3 118 27.8 19.3 144 SYLVAN ROAD 8120 17.3 12.5 138 19.7 16.2 122 YOUNTS PEAK 8350 21.6 17.3 125 19.1 16.7 114 ----- ----- Basin wide percent of average 125 131 POWDER-TONGUE BEAR TRAP MEADOW 7900 4.8 7.2 67 9.5 8.2 116 BIG GOOSE 7990 6.6 -M * 10.0 -M * BONE SPRINGS DIV 9350 16.1 16.5 98 16.0 15.1 106 BURGESS JUNCTION 7880 9.0 11.8 76 10.7 11.5 93 CLOUD PEAK RESERVOIR 9860 15.2 14.9 102 13.1 13.3 98 DOME LAKE 8880 -M 13.8 * 11.3 13.2 86 GRAVE SPRINGS 8550 8.3 9.6 86 11.2 9.6 117 HANSEN SAWMILL 8760 4.5 7.1 63 8.4 7.9 106 MIDDLE POWDER 7760 10.6 12.2 87 15.4 11.8 131 POWDER RIVER PASS 9480 11.9 10.9 109 15.1 11.5 131 SUCKER CREEK 8880 10.3 12.2 84 12.8 13.1 98 TIE CREEK 6870 2.4 -M * 8.8 11.0 80 ----- ----- Basin wide percent of average 89 105 BELLE FOURCHE BLIND PARK 6890 6.6 11.1 59 15.7 10.0 157 NORTH RAPID CREEK 6130 5.6 -M * 13.0 -M * WARREN PEAK 6520 10.1 11.1 91 14.6 8.0 182 ----- ----- Basin wide percent of average 75 168 UPPER N. PLATTE RIVER COLUMBINE 9400 18.5 24.9 74 21.4 24.5 87 DIVIDE PEAK 8800 18.0 21.3 85 23.6 22.8 104 ELK RIVER 8700 15.0 20.0 75 21.6 19.2 113 JOE WRIGHT 10120 19.4 22.1 88 25.7 25.0 103 NORTH FRENCH CREEK 10100 28.9 25.6 113 28.1 23.5 120 OLD BATTLE 10000 28.0 32.2 87 34.6 30.2 115 SOUTH BRUSH CREEK 8400 11.3 13.4 84 18.9 16.3 116 TOWER 10500 42.5 45.4 94 37.7 36.2 104 WEBBER SPRINGS 9200 18.3 28.3 65 25.3 25.2 100 WILLOW CREEK PASS 9540 11.3 12.0 94 11.7 12.6 93 ----- ----- Basin wide percent of average 86 106 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 15.5 26.4 59 21.6 19.4 111 CASPER MTN. 7900 10.3 16.6 62 15.9 14.0 114 DEADMAN HILL 10220 15.8 16.6 95 16.7 16.7 100 DEER PARK 9700 16.6 -M * 21.7 -M * LAPRELE CREEK 8320 -M 10.6 * 14.0 11.8 119 RENO HILL 8400 13.1 14.4 91 17.5 19.2 91 ROACH 9700 15.1 17.4 87 18.6 21.1 88 SAND LAKE 10080 33.6 33.1 102 27.8 20.3 137 SOUTH PASS 9040 17.7 16.4 108 18.7 17.1 109 WINDY PEAK 7840 6.2 8.8 70 12.6 9.5 133 ----- ----- Basin wide percent of average 85 110 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 10.0 11.3 88 16.6 15.3 108 DIVIDE PEAK 8800 18.0 21.3 85 23.6 22.8 104 OLD BATTLE 10000 28.0 32.2 87 34.6 30.2 115 SANDSTONE RS 8150 11.2 15.0 75 19.7 18.6 106 WHISKEY PARK 8950 25.4 29.0 88 28.7 28.2 102 ----- ----- Basin wide percent of average 85 107 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.7 14.7 114 15.4 16.6 93 BLIND BULL SUM 8650 -M 29.8 * 22.0 24.6 89 EAST RIM DIVIDE 7930 13.9 14.0 99 14.2 15.5 92 ELKHART PARK G.S. 9400 14.0 13.9 101 14.6 16.3 90 GROS VENTRE SUMMIT 8775 16.0 15.8 101 15.7 16.3 96 KENDALL R.S. 7740 15.2 14.7 103 16.3 15.9 103 LOOMIS PARK 8240 -M 17.6 * 20.2 19.3 105 NEW FORK LAKE 8340 12.5 11.3 111 11.8 14.8 80 SNIDER BASIN 8250 16.3 14.9 109 16.9 15.5 109 SPRING CREEK DIVIDE 9000 29.6 28.3 105 27.7 28.1 99 TRIPLE PEAK 8500 29.3 25.9 113 29.6 31.7 93 ----- ----- Basin wide percent of average 107 95 LOWER GREEN RIVER HAMS FORK 7840 13.4 12.3 109 11.2 13.7 82 HEWINTA 9500 11.7 11.5 102 13.9 13.1 106 HICKERSON PARK 9150 5.6 6.9 81 9.3 9.5 98 HOLE-IN-ROCK 9150 5.9 6.5 91 -M 9.5 * INDIAN CREEK 9425 29.4 29.0 101 24.3 26.6 91 KELLEY R.S. 8180 17.1 17.3 99 18.6 19.2 97 STEEL CREEK PARK 10100 14.3 16.6 86 16.3 12.8 127 ----- ----- Basin wide percent of average 97 99 UPPER BEAR RIVER BUG LAKE 7950 21.7 21.3 102 19.7 19.6 101 HAYDEN FORK 9400 14.7 16.5 89 20.0 19.1 105 KELLEY R.S. 8180 17.1 17.3 99 18.6 19.2 97 LILY LAKE 9050 11.8 13.4 88 17.8 14.8 120 MONTE CRISTO 8960 26.0 29.9 87 25.9 25.7 101 SALT RIVER SUMMIT 7600 16.2 14.5 112 18.5 17.3 107 TRIAL LAKE 9960 20.9 25.0 84 21.9 24.0 91 ----- ----- Basin wide percent of average 93 102 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. If the Basin wide percent of average value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Average represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the average value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the average value for those sites on this day. Contact your state water supply staff for assistance. Reference period for average conditions is 1961-90. Provisional data, subject to revision. ---------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100.